<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script type="text/javascript">
  document.write("<h1>This is a header</h1>");
  document.write("<p>This is a paragraph</p>");
  document.write("<p>This is another paragraph</p>");
</script>
<script>
  {document.write("<h1>This is a header</h1>");
    document.write("<p>This is a paragraph</p>");
    document.write("<p>This is another paragraph</p>");
  }
</script>
<script>
  var x = 5;
  var y;
  var z;
  y = x+3;
  z = y-4;
  document.write(y+","+z);
</script>
</body>
</html>